package com.common.gateway.filter;

import com.alibaba.fastjson.JSONObject;
import org.springframework.cloud.gateway.filter.GatewayFilterChain;
import org.springframework.cloud.gateway.filter.GlobalFilter;
import org.springframework.core.Ordered;
import org.springframework.core.io.buffer.DataBuffer;
import org.springframework.http.server.reactive.ServerHttpRequest;
import org.springframework.http.server.reactive.ServerHttpResponse;
import org.springframework.stereotype.Component;
import org.springframework.util.AntPathMatcher;
import org.springframework.web.server.ServerWebExchange;
import reactor.core.publisher.Mono;

import java.nio.charset.StandardCharsets;

/**
 * 描述：
 * 全局鉴权认证
 * @author xianggj
 * @Date 2021/11/10 10:51
 **/
@Component
public class AuthGlobalFilter implements GlobalFilter, Ordered {

    @Override
    public Mono<Void> filter(ServerWebExchange exchange, GatewayFilterChain chain) {
        ServerHttpRequest request = exchange.getRequest();
        String path = request.getURI().getPath();

        //校验用户必须登录
        AntPathMatcher antPathMatcher = new AntPathMatcher();
        if(antPathMatcher.match("/ccf/**", path)) {
//            List<String> tokenList = request.getHeaders().get("token");
//
//            //没有token
//            if(null == tokenList) {
//                ServerHttpResponse response = exchange.getResponse();
//                return out(response);
//            }

            //token校验失败
//            Boolean isCheck = JwtUtils.checkJwtTToken(tokenList.get(0));
//            if(!isCheck) {
//                ServerHttpResponse response = exchange.getResponse();
//                return out(response);
//            }
        }

        //放行
        return chain.filter(exchange);
    }


    @Override
    public int getOrder() {
        //定义当前过滤器的优先级，值越小，优先级越高
        return 0;
    }

    private Mono<Void> out(ServerHttpResponse response) {

        JSONObject message = new JSONObject();
        message.put("success", false);
        message.put("code", 401);
        message.put("data", "");
        message.put("message", "鉴权失败");
        byte[] bytes = message.toString().getBytes(StandardCharsets.UTF_8);
        DataBuffer buffer = response.bufferFactory().wrap(bytes);
        //指定编码，否则在浏览器中会中文乱码
        response.getHeaders().add("Content-Type", "application/json;charset=UTF-8");
        //输出http响应
        return response.writeWith(Mono.just(buffer));
    }
}
